C#•3y ago

Passing the where parameters by the function

How do I get this sample code to work? Unfortunately, it does not want to work.

    public async Task<User> GetAsync(Func<Models.User, bool> selector)
    {
        _model = await this.GetData().Where(x => selector(x)).SingleOrDefaultAsync() ?? new();
        return new(_context, _model);
    }

    public async Task<User> GetAsync(Func<Models.User, bool> selector)
    {
        _model = await this.GetData().Where(x => selector(x)).SingleOrDefaultAsync() ?? new();
        return new(_context, _model);
    }

Use:

var user = await User.GetAsync(x => x.Mail == Model.Identifier || (x.Phone == Model.Identifier && x.PhoneCode == Model.PhoneCode));

var user = await User.GetAsync(x => x.Mail == Model.Identifier || (x.Phone == Model.Identifier && x.PhoneCode == Model.PhoneCode));

5 Replies

Angius•3y ago

Try just .Where(selector) Ah, is this EF?

AlerinOP•3y ago

Yes

Angius•3y ago

If so, you might need Expression<Func<User, bool>> instead At least Select()s need that Expression<> wrapper

AlerinOP•3y ago

    public async Task<User> GetAsync(Expression<Func<Models.User, bool>> predicate)
    {
        _model = await this.GetData().Where(predicate).SingleOrDefaultAsync() ?? new();
        return new(_context, _model);
    }

    public async Task<User> GetAsync(Expression<Func<Models.User, bool>> predicate)
    {
        _model = await this.GetData().Where(predicate).SingleOrDefaultAsync() ?? new();
        return new(_context, _model);
    }

It actually works. Thanks!

Angius•3y ago

Nice

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Programming

Passing the where parameters by the function